After spending most of his nights for several weeks at Roy Mustang's house, Edward had became quite aware of all those little habits Roy seemed to have a lot.
One of them was leaving those little yellow notes on the fridge door. And Ed had developed a habit of his own from reading those notes while eating his breakfast alone when Roy had to leave for work early.
'Remember to buy bread' , 'Remember the haircut on Friday' , 'Remember to do laundry'… Remember this and remember that.
There was also some phrases, like 'Enjoy your life' or 'Smile and the World smiles back'. Roy really seemed to follow these sayings.
And, there was always one note meant to Ed. Those notes were always full of sweet words, from simple 'I love you' to the most emotional verses he didn't quite even get, but they sure were beautiful.
Edward always made sure to take these notes with him before going to work every morning.
He also made sure to always to take the 'Remember to buy milk' ones away.